linux-kernel - Re: [RFC PATCH v2 0/3] KVM: allow mapping of compound tail pages for IO or PFNMAP mapping

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Message-ID: <Zcrc7UxSO3-Cncjm@google.com>
Date: Mon, 12 Feb 2024 19:07:25 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Yan Zhao <yan.y.zhao@...el.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, pbonzini@...hat.com, shuah@...nel.org, 
	stevensd@...omium.org
Subject: Re: [RFC PATCH v2 0/3] KVM: allow mapping of compound tail pages for
 IO or PFNMAP mapping

On Wed, Jan 03, 2024, Yan Zhao wrote:
> This is a v2 for previous series [1] to allow mapping for compound tail
> pages for IO or PFNMAP mapping.
> 
> Compared to v1, this version provides selftest to check functionality in
> KVM to map memslots for MMIO BARs (VMAs with flag VM_IO | VM_PFNMAP), as
> requested by Sean in [1].

Doh.  So I didn't intend for you to have to create a mock device just to be able
to run a selftest.  I assumed it would be easy-ish to utilize an existing generic
device.  I take it that's not the case?